From Robert Burt:

Re: Human evolution, radically reappraised (March 26): It does make sense that more and greater advances in biological development are likelier in populations of higher intelligence, higher numbers, and higher knowledge. Combine these with the increased numbers of active individuals, as compared with passive or relatively inactive individuals which a larger population is likely to provide, and intentional advances in human evolution become more probable. The force with which may now be accomplished is perhaps one of the most important advantages humans have over most, if not all, other species. The idea that evolution is not a static process, but that every species is a transitional form, is more accurate, it has seemed to me for some time.